ZM7304G-65503Y-Q1 POWER-ONE [Power-One], ZM7304G-65503Y-Q1 Datasheet - Page 20

• Manufacturer Part Number: ZM7304G-65503Y-Q1
• Description: Digital Power Manager
• Manufacturer: POWER-ONE [Power-One]

15.
changed.
Note: If the Reference Voltage setting is changed during operation of the DPM, then the power to the DPM
U1 and R1 are additional components. U1 is an industry standard 2.5V voltage reference such as TL431 or
similar. C1 is an existing component but its value changes depending on the type of voltage reference. Common
voltage reference part numbers and values of associated components are shown in Table 4
Accuracy of the protection thresholds in the case of external reference is determined by the sum of accuracy of the
voltage reference, accuracy of the 10k/47k resistive divider shown in Figure 15, and conversion error of the
internal ADC specified in 8.2.
10.5
POL converters and Auxiliary Devices can be arranged in up to four groups. A group of POL converters is defined
as a number of POL converters with interconnected OK pins. Auxiliary Devices are added to a group in the GUI,
without any external connections. A group can include from 1 to 32 POL converters, but a POL converter can be a
member of only one group. In addition, the OK lines can be connected to the DPM to facilitate propagation of
faults and errors between groups. One DPM can manage up to four independent groups: A, B, C, and D,
depending on model of the DPM.
Group management includes fault and error propagation, margining, turn-on and turn-off, monitoring setup, and
interrupt configuration.
REV. 3.3 NOV 26, 2007
The GUI automatically changes values of the IBL and IBH thresholds when the reference selection is
needs to be cycled or the HRES_N pin needs to be pulled low and released
POL Group Management
Figure 15. External Voltage Reference Connections
Table 4. Component Values For External Reference
U1 Part Number
Manufacturer
Accuracy, %
R1, Ohms
C1, nF
www.power-one.com
Greater than 10
ZM7300G Series Digital Power Manager
100-620
0.5, 1, 2
TL431
TI
Less than 1
510-2000
0.5, 1, 2
ZR431
Zetex
Page 20 of 32
Data Sheet